EX-421 Datasheet, PDF (4/5 Pages) Vectron International, Inc – Evacuated Miniature Crystal Oscillator

Recommended Reflow Profiles for Pb-Free & Sn-Pb
T_p
T_L
Ts
tp
Ramp up
t_L
Critical Zone
T_L to T_p
Ramp dow n
Ts
25
ts
preheat
t 25°C to peak
Time
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230°C Reflow Profile
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WƌŽĮůĞ &ĞĂƚƵƌĞ
Average ramp-up rate (TL to TP)
Preheat - Temperature min Tsmin
- Temperature Min Tsmax
- Time (min to max) (ts)
3°C/seconds max.
135°C
155°C
60-90 seconds
Time 25°C to Peak Temperature
Time maintained above
- Temperature (TL)
- Time (tL)
Tsmax to TL -Ramp-up Rate
3°C/seconds max.
Time maintained above - Temperature (TL)
183°C
Time within 5°C of actual
- Time (TL)
40-60 seconds
Peak Temperature (tp)
Peak Temperature (Tp)
max 230°C
Ramp-down Rate
EŽƚĞ͗ All temperatures refer to topside of the package, measured on the package body surface.
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4 minutes max.
183°C
45-60 seconds
10-20 seconds max.
6°C/seconds max.
WƌŽĮůĞ &ĞĂƚƵƌĞ
260°C Reflow Profile
WďͲ&ƌĞĞ ƐƐĞŵďůLJ
WƌŽĮůĞ &ĞĂƚƵƌĞ
Average ramp-up rate (TL to TP)
3°C/seconds max.
Time 25°C to Peak Temperature
Preheat - Temperature min Tsmin
150°C
Time maintained above
- Temperature min Tsmax
200°C
- Temperature (TL)
- Time (min to max) (ts)
60-180 seconds
- Time (tL)
Tsmax to TL -Ramp-up Rate
3°C/seconds max.
Time maintained above - Temperature (TL)
217°C
Time within 5°C of actual
- Time (TL)
60-150 seconds
Peak Temperature (tp)
Peak Temperature (Tp)
max 260°C
Ramp-down Rate
EŽƚĞ͗ All temperatures refer to topside of the package, measured on the package body surface.
WďͲ&ƌĞĞ ƐƐĞŵďůLJ
8 minutes max.
217°C
60-150 seconds
20-40 seconds max.
6°C/seconds max.
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